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Gleditsia triacanthos is a new and superior salt- and alkali-tolerant tree species for the Yangtze River Delta region
Gleditsia triacanthos (honey locust), of the Fabaceae family and the genus Gleditsia. A deciduous tree, its branches often bear thorns, its leaves are bright green and usually bipinnately compound, turning yellow in autumn, and its fruit is a large, often twisted pod. It prefers full sun, grows normally in saline-alkali soil, has strong adaptability to soil, can withstand low temperatures below -30°C, and is very cold-hardy. Its crown is large, making it a good shade tree.
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What are the characteristics of superior hybrid varieties of Taxus media?
1. 20,000 3-year-old Taxus media seedlings were introduced from Canada, mainly for large-scale production of the raw material for the anticancer drug paclitaxel. Taxus in China grows slowly and has a relatively low paclitaxel content, and as a rare tree species it is listed as a national first-class protected plant. Taxus media has a paclitaxel content of about 0.02% in its branches and leaves, and 0.03%-0.04% in its bark, which is 2-3 times the bark content of 60-year-old Taxus in China, and its growth rate is 3 times that of Taxus in China, so it can be utilized at 3-6 years of age. It has the characteristics of an indistinct
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Golden-leaf dawn redwood is a new and superior colored-leaf tree species
Dawn redwood (Metasequoia glyptostroboides) is the only surviving species of the genus Metasequoia in the family Cupressaceae. This species was once thought to be extinct, until it was discovered in 1941 in the Lichuan area of Hubei, China, and afterwards this plant was also found successively in the Wanxian area of Sichuan. In 1947, dawn redwood seeds were introduced to the Arnold Arboretum in the United States, and from there spread to botanical gardens around the world. In 1948, "dawn redwood" and its scientific name were formally named, and since then it has enjoyed great fame in China and even the whole
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What are the superior varieties of black locust? These 3 varieties are worth planting
I. Yulocust No. 1. Yulocust No. 1 (unified number 8048) passed the review of the Henan Provincial Forest Tree Improved Variety Examination and Approval Committee in 2000. This variety has light gray bark, shallow fissures, and small, uniform fissure pieces. The main trunk is straight to the top, and the lateral branches are long and sparse. The crown is obovate, and the leaflets are relatively wide and oblong. It grows rapidly and yields high and stable production. When planted in the loess hilly area of western Henan, the 5-year-old trees reached a height of 9.14 m and a diameter at breast height of 7.41 cm, significantly exceeding the local common black locust. In Baotou City, Inner Mongolia, under conditions of 350 mm annual rainfall, 0.3% soil salinity in sandy soil, and an extreme minimum temperature of -37°C, Yulocust No. 1 had no frost damage at all. The 7-year-old trees reached a height of 11.8 m and a diameter at breast height of 17.2 cm, exceeding the local common black locust in Inner Mongolia by 13.4% and 138.9%, respectively, and the timber volume exceeded it several times over. Therefore, Yulocust No. 1 is also suitable for afforestation in arid and cold regions, and is the best black locust variety for windbreak and sand fixation in the northwest region.
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